Basaltic and Other Volcanic–Rock Aquifers
0 Figure 38. Large volumes NW SE Well of water move rapidly from Mammoth Cave Plateau Pennyroyal Plain Figure 39. Water levels in 2 A sinkholes and swallow holes wells completed in sandstone 4 through a well-developed net- and carbonate-rock aquifers Well B Well A 6 work of solution cavities in the respond differently to recharge. Big Clifty Sandstone Perched water 8 St. Louis and Ste. Genevieve Member of Golconda Sinkhole table Changes in the water level in Water table 10 Limestones to discharge at Formation QQ Q QQ Q well A, completed in sandstone, springs or to the Green River. Spring Swallow hole show that the sandstone is 12 Sinkhole The openings were formed by recharged quickly but drains 14 Sinkhole dissolution of the limestones as slowly. In contrast, changes in 16 water moved along bedding Spring the water level in well B, open